25340240451 has 4 divisors (see below), whose sum is σ = 33786987272. Its totient is φ = 16893493632.

The previous prime is 25340240449. The next prime is 25340240461. The reversal of 25340240451 is 15404204352.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25340240451 - 2¹ = 25340240449 is a prime.

It is a super-2 number, since 2×25340240451² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25340240461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4223373406 + ... + 4223373411.

It is an arithmetic number, because the mean of its divisors is an integer number (8446746818).

Almost surely, 2^25340240451 is an apocalyptic number.

25340240451 is a deficient number, since it is larger than the sum of its proper divisors (8446746821).

25340240451 is an equidigital number, since it uses as much as digits as its factorization.

25340240451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8446746820.

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 25340240451 in words is "twenty-five billion, three hundred forty million, two hundred forty thousand, four hundred fifty-one".